Abstract—This paper presents a simple low-cost control ar-chitecture for low-voltage hysteretic r... more Abstract—This paper presents a simple low-cost control ar-chitecture for low-voltage hysteretic regulators supplying loads with low-to-medium current consumption. Only two sensed volt-ages, a passive filter network and a hysteretic comparator are required to implement the ...
Abstract—This paper reviews the power electronic applications for wind energy systems. Various wi... more Abstract—This paper reviews the power electronic applications for wind energy systems. Various wind turbine systems with differ-ent generators and power electronic converters are described, and different technical features are compared. The electrical topolo-gies of wind farms with different wind turbines are summarized and the possible uses of power electronic converters with wind farms are shown. Finally, the possible methods of using the power electronic technology for improving wind turbine performance in power systems to meet the main grid connection requirements are discussed. Index Terms—Fault ride-through, grid connection, power elec-tronics converters, reactive power compensation, wind energy con-version, wind farms, wind turbine control. I.
Abstract—The injection of sinusoidal current to an electrical grid is nowadays possible with the ... more Abstract—The injection of sinusoidal current to an electrical grid is nowadays possible with the use of active power filters (APFs). With quasi-steady-state (QSS) nonlinear controllers, these power filters provide low grid-current-harmonic content with simple-control analog implementation. This paper focuses on the design of a QSS nonlinear controller for a single-phase APF. A complete analysis based on the sliding-mode-control theory is given. From the analysis, a set of control-design guidelines is presented to select the gains and parameters of the control scheme. Selected experimental results are reported to validate the theoretical design procedure. Index Terms—Active power filter (APF), harmonics, power quality, quasi steady-state (QSS) approach. I.
Position sensorless control of reluctance and permanent magnet synchronous machines at zero and l... more Position sensorless control of reluctance and permanent magnet synchronous machines at zero and low speed is possible using HF voltage injection and proper demodulation. The so-called saliency position, which is tracked by the HF sensorless scheme, is different from the actual rotor position: the difference contains both offset and rotor-position-varying components, which may be explained by carefully considering the HF behavior of the machine and the effect that fundamental excitation and rotor position have upon it. This paper gives insight into the HF behavior of synchronous machines and serves as a practical guide for implementation of stable and robust position estimation at zero and low speed.
Abstract—This paper presents a simple low-cost control ar-chitecture for low-voltage hysteretic r... more Abstract—This paper presents a simple low-cost control ar-chitecture for low-voltage hysteretic regulators supplying loads with low-to-medium current consumption. Only two sensed volt-ages, a passive filter network and a hysteretic comparator are required to implement the ...
Abstract—This paper reviews the power electronic applications for wind energy systems. Various wi... more Abstract—This paper reviews the power electronic applications for wind energy systems. Various wind turbine systems with differ-ent generators and power electronic converters are described, and different technical features are compared. The electrical topolo-gies of wind farms with different wind turbines are summarized and the possible uses of power electronic converters with wind farms are shown. Finally, the possible methods of using the power electronic technology for improving wind turbine performance in power systems to meet the main grid connection requirements are discussed. Index Terms—Fault ride-through, grid connection, power elec-tronics converters, reactive power compensation, wind energy con-version, wind farms, wind turbine control. I.
Abstract—The injection of sinusoidal current to an electrical grid is nowadays possible with the ... more Abstract—The injection of sinusoidal current to an electrical grid is nowadays possible with the use of active power filters (APFs). With quasi-steady-state (QSS) nonlinear controllers, these power filters provide low grid-current-harmonic content with simple-control analog implementation. This paper focuses on the design of a QSS nonlinear controller for a single-phase APF. A complete analysis based on the sliding-mode-control theory is given. From the analysis, a set of control-design guidelines is presented to select the gains and parameters of the control scheme. Selected experimental results are reported to validate the theoretical design procedure. Index Terms—Active power filter (APF), harmonics, power quality, quasi steady-state (QSS) approach. I.
Position sensorless control of reluctance and permanent magnet synchronous machines at zero and l... more Position sensorless control of reluctance and permanent magnet synchronous machines at zero and low speed is possible using HF voltage injection and proper demodulation. The so-called saliency position, which is tracked by the HF sensorless scheme, is different from the actual rotor position: the difference contains both offset and rotor-position-varying components, which may be explained by carefully considering the HF behavior of the machine and the effect that fundamental excitation and rotor position have upon it. This paper gives insight into the HF behavior of synchronous machines and serves as a practical guide for implementation of stable and robust position estimation at zero and low speed.
Uploads
Papers